Freedom. Find whatever makes you free, and do that. Gadgets are a small set of the tools that can make that possible. Knowledge is even better. I see that bga

Freedom. Find whatever makes you free, and do that. Gadgets are a small set of the tools that can make that possible. Knowledge is even better. I see that bgar's already asked you what you have. What do you want to do? (For me, if constrained to gadgets, perhaps a DAQ card can open a lot of doors. Arduinos are cheap, LabJacks and fancier can get a lot more done with greater sensitivity. Got only $10 and an I2C interface? You can have an unreasonable quantity of fun with an AD7746. Seriously.)